Method of making tapered cups



'Sept. 16, 1941. 5 LABQMBARDE 2,255,982

METHOI-D OFVMAKING TAPERED CUPS Original Filed June 27, 1936 s SheetS- -Sheej 1 w: a QR P 1941- H. s. LABOMBARDE METHOD OF MAKING TAPERED CUPS 6 Sheets-Sheet 2 Original Filed June 27, 1936 p 1941- H. s. LABOMBARDE METHOD OF MAKING TAPERED CUPS Original Filed June 27, 1936 6 Sheets-Sheet 3 M d/LL (Egg Sept. 16, 1941- H. s. LABOMBARDE METHOD OF MAKING TAPEEED CUPS Original Filed June 27, 1936 6 Sheets-Sheet 4 p 6, 1941. H. s. LABOMBARDE 2,255,982

METHOD OF MAKING TIAPERED curs I Original Filed June 27, 1936. e Sheets-Sheet 5 ii ll l III mum

p 1941- H. SLABOMBARDE, 2,255,982

METHOD OF MAKING TAPERED CUPS Original Filed June 27, 1936 GSheets-Sheet 6 Patented Sept. 16, 1941 2,255,982 METHOD oF MAKING TAPERED curs Harold S. Labombarde, Nashua, N. IL, assignor to Dixie-Vortex Company, Chicago, 11]., a corporation of Delaware Application June 27, 1936, Serial No. 87,628 Renewed April 14, 1939 11 Claims.

The principal object is to provide a machine with greatly increased speed for making tapered 'cups of paper or similar material, my machine being about six times as fast as any machine heretofore known.

A feature of my invention is that the blanks are formed in flat condition and held under pressure in flat condition until the glue is set sufliciently for distending and nesting. Preferably the forming and drying operations are at continuous rotary high speed. From the time the blanks are put in motion by the feeder until they come to rest in the nesting device they travel preferably at one continuous high speed. All the registering, scoring, folding, gluing and drying operations are rotary as distinguished from plunger, or other reciprocating operations.

Another feature is that the flat cups are mechanically opened coincident with the nesting operation. A 1

Another feature is that an operations of folding, gluing and nesting are performed while the blank, even when formed into a cup, travels forward always at a continuous uniform speed in a straight path,

Other features will be pointed out below.

In the drawings Figures 1 and 2 are sectional diagrammatic elevations substantially on the line l-l of Figure I 3 and line 2-2 of Figure 4, respectively;

Figures 3 and 4 are diagrammatic plans of Fig ures 1 and 2, respectively;

Figure 5 is an end view of the roll for transferring the glued cup; I

Figure 6 is a sectional elevation of the comb, ing roll and contiguous parts on line 6-6 of Figure 7;

Figure 7 is a sectional elevation substantially on the line |-'l of Figure 6;

Figure 8 is an elevation of the feeding mechanism for the glued cups; and Figure 8a is a fragmentary plan showing a cup in the nip of rolls 28 and 30.

Figure 9 is a sectional elevation on line 9 9 of Figure 10 showing the mechanism for distending the cups;

Figure 10 is a plan of the same;

Figures 11 and 12' represent a blank showing the scoring for the first and second folds;

Figures 13 and 14 show the blank after passing the first folding roll and after the application of the glue;

Figures 15 and 16 represent the blank after the second fold has been made and passed to Ward the end scoring roll;

Figure 17 represents fold;

Figures 18 and 19 show the end folded over as it passes forward to be distended; and

Figures 20 and 21 show the distended cups as nested.

the scoring for the end The blanks shown in Figure 11 are banked in,

the hopper I. Sufficient slope and weight back of this bank with the slope of the hopper brings the forward one against the comb roll 2, as shown in Figure 1. A single blank is picked up and moved around the roll by means which will be described later.

Three blanks are picked up in each revolution of the roll 2. The belts 44, move these forward against pins fixed to the chains 4 and 5 on either side, which chains are run at a slower speed than the belts 3 and thus the blanks are registered. The blanks pass forward into registering and drive rolls 5 and 1 and then between scoring rolls 6 and 1' where they are scored or creased, as shown in Figure 11, and are delivered between upper and lower carrier belts l6. These carrier belts carry the blanks through the various folding operations until the blanks are in the form shown in Figure 13. The folding mechanism consists of the rolls 8 and 8, the disc 8 and folder plate 8. The rolls 8 and 8 fold the left flap into vertical position and the disc 8' and folder plate 9 -fold the flap l0 into the position of Figure 13. Then the blanks are moved forward, as shown in Figures 2 and 4, passing under the glue roll l2 where glue is applied to the flap that has been folded over, as well as to the end tab X. Roll I3 supports the blanks during the gluing. The rolls 8 and 9 and I4 and I5 are rotary folders, the former folding the left flap and the latter folding the right flap in the same manner. The belts It transfer the blank under the first rolls and the movement is transferred at the time ofreaching the glue roll to the other side to enable the rolls I4 and ii to act to fold the other flap. The blank then passes under the end scorers l6 and I6 and the folded blank is scored, as shown in Figure 17. The continuously rotating folding arm I8 swings the leading flap or tab up into vertical position. The blank then enters a chute way l8 which folds, the tab from the vertical position down on to the body of the cup. The blanks then move about the roll I! between the belts 20 and 2|. All of the time, from pulleys 2| and 2| clear through to the nesting mechanism, the belts are under tension and 22 in Figure 5, side loose rolls 23 and24 sup-1 V receptacle or runway 32. l I Referring. now to Figures 6 and 7, the combing bracket 40 to the front of the hopper 4|.

necting v with thesepassages .is a suction pipe 42;

porting the blank as it moves around the roll I! and between the belts 2| and 22. Passing under pressure. as is shown in Figures 1 and 9, the

' blanks pass between rolls 25 and 26 and thence gauge which engages a blahk greater than the entire area of the friction plug to prevent rapid wear of the gauge, which wear occurs if the 'gauge is at any time supported by the friction toi'eed rolls 21, 28, 29 and 30, the roll 28 being;

2 a narrow to permit'action of thetwo air blasts referred to below":

Referring now to Figure 10, the blank passes from between therolls 2a and so into the travelling belts 3i and 3|" which, are grooved and spaced to give the desired'distention or opening to the gluedblank. Air pressure acts through conduits 33 and 34 to distendtheblank which 82nd 3| into the passes from the conveyors 3| roll .35 is provided, with the passages 33 and. 311

in triplicate. At 'the periphery of the roll rubber V plugs 38 are inserted and the passages and 31.

connect with depressions or chambers in the,

member 39 rigidly supported by means of the and as the plugs 38 reach the proper position-for action on one of the blank in the hopper, they connect with the chambers 43 and the suction draws theadjacent blank between the belt 44 and the periphery of the roll, spring actuated friction,

- gauge 43,.located between belts 44 and 44', act- Coning to allow the feeding of onlyone blank at a time from hopper 4|. As the passages 33 reach the flat point of the belt a second chamber 45 connected with the outer air permits air to break the suction through the inlet 46 and the blank; is then carried forward, as has been explained.

Referring to Figure 8, the feed movement for moving thedistended cups is actuated by means of bell crank 50 operating on the cam 5! through: the pitman 52 to the lever 53, on which is a pawl 54 engaging the ratchet 55. As the cam 5| revolves it operates to move the ratchet 55 one tooth. The pawl 56, towhich is connectedthe finger SLoperates to catch the end of the bell crank 50 in case no blank is passing over the-finger 51 .The operation of the feed is by 'means" of the springacting in reverse.

.The counter comprises a lever in the end 7 of'whichis inserted a lead pencil 6]." This lever, ..is actuated from a cam .62 to operate on a prerdetermined plurality of cups as they pass to be distended, the pencil marking the desired cup' 'whileit. is being distended, the air forcing a portion of the cup against the pencil.

In Figure 8 a folded and glued cup in flat form is shown entering the nest'B, the most rearward portion of the cup being held in the nip ofnarrow rubber roll 28 and lower roll 30. The air conduits 33 and 34 force air within the rearv of the cup at the portions not in said nip. This results in a preliminary opening of the cup sides while the front .end of the cup is entering the nest. When thecup leaves said nip control the distending action is continued by the air,

.whichacts not only to completely distend or open the cup but also to force the cup into fully nested position and in engagement with belts "plug which wear would make the active surfaces of the friction plug and gauge inoperative. V

zwhat I 'claim is:

l. The m'ethodof making tapered cups consist ing in forming blanks into folded and. glued tapered cups complete in flat form; then forcefully partially opening the complete flat ,cups; and

then completing the openingand, coincidentally with said complete opening, nesting the cups while moving each blank continuously along a predetermined path. 7 The method of making pered cups complete in flat form; and then conducting air under pressure into the fiat cups to forcefully open the cups and also to forcefully move the cups into nested position.

3. The method ofrmaking tapered cups, in-.

cludingforming blanks successively into folded and glued tapered cups while moving each blank continuously along a predetermined path, and applying a motive gas to each cup to expand I the same from its fiat state and move it forwardv into nested relationship with previously formed cups. I

4. The method of making tapered cups with an upturned endto provide a closure from a plying a motive gas to the open end of the cup to initially expand the cup, and subjecting the side edges of the cup to compression to further expand the cup. I

6. The method of making a tapered cup, including forming, a blank of stock into a folded and glued tapered cup complete in flat form with creased ,"side edges, applyin a motive gas to the=open end of the cup to initially expand the cup, subjecting the side edges of the cup to An important advantage of my initial feeding I,

mechanism is that the friction gauge 43' maintainsa uniform resistance to the blanks being fed regardless of wear on the gauge so that uni- 7 form one-by-one feeding is maintained for n a long period of time. I prefer to'have the area of that part of the compression to further expand the cup, and moving 'the' cup while under such compression into nested relationship with previously formed cups. Y

7. The method of making a container including moving a blank of stock continuously along a predetermined path, folding over a portion of the blank upon ,the remainder, applying adhesive to the folded part, folding over another part of the blank on the first folded part, turning up an end portion of the blank to close that end, compressing the thus formed container to set the adhesive, applying a motive gas to the openend of the container to expand it, and nesting the container in previously formed containers with the aid of said motive gas.

8. The method. of making a flat having an upturned bottom closure from a substantially sector-shaped blank, including folding a side portion of the blank over the adjacent part; applying, a single stripe of adhesive ex-' tending alongthe margin of the folded part and on the end portion to be upturned, folding over the other side part on said adhesive, turning up tapered cups con- 7 sisting in forming blanks into folded and glued ta- 7 tapered cup the end portion and sealing it to the body part of the thus formed container, and applying a motive gas to the open end of said container to expand the container.

,9. The method of making a paper cup, including continuously moving a blank 01' stock along a predetermined path, initially gripping and driving the blank adjacent one side thereof while forming the other side, then transferring the grip and drive to the formed side and forming the remaining side.

10. The method of forming a wedge-shaped cup with an upturned end portion from a single blank 01 paper resembling in shape a segment of a circle which consists in moving the blank along a given path and at one stationfolding one side portion directly over and on the main body of the blank to form substantially one-hall of the cup, gluing both the margin of the folded side portion and the end portion to be upturned in a single operation, then at a succeeding station folding the other side portion of the blank directly over and on said main body of the blank in overlapped relation with said first side portion or the blank to form substantially the other half or the cup, subsequently pressing said overlapped side portions to cement them together, thereafter at a next station turning the end of the blank upwardly on and over the lower part of said overlapped side portions, next pressing said turned end to cement it to said part, and adjacent the discharge end of said path forcefully opening the formed cup to enable it to be disposed in nested relation with other similarly formed cups.

11. The method of making a tapered paper cup, including the steps of moving a blank 01' stock along a predetermined path, successively folding over side flap portions of the blank diretly upon the central body part or the blank and creasing them in position, turning up an end closure over the body and folded side flaps, securing overlapped marginal portions together to provide a central seam, gripping said blank over said central seam, applyin 8' m ive as to the open end of the blank to expand it on both sides of the gripped seam, and releasing the grip on the seam permitting the motive gas to further expand the open end of the cup and force it into nested relationship with previously formed cups.

HAROLD S. LABOMBARDE. 

